final Scanner qualifier_scanner = client.newScanner(table);
qualifier_scanner.setStartKey("cf1");
qualifier_scanner.setStopKey("cf4");
qualifier_scanner.setFilter(
new QualifierFilter(CompareOp.GREATER,
new BinaryComparator(Bytes.UTF8("b"))));
final ArrayList<ArrayList<KeyValue>> qualifier_rows =
qualifier_scanner.nextRows().join();
assertSizeIs(1, qualifier_rows);
assertSizeIs(2, qualifier_rows.get(0));